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Prince Raj

Software Engineer · Full-stack systems · LLM evaluation · AWS

  • praj81232@gmail.com
  • +91 82183 28333
  • Noida, India
  • github.com/HardCoder404 · linkedin.com/in/prince404

Summary

Software engineer with 2+ years of experience shipping full-stack products on Node, Next.js and AWS, and the last year spent on LLM evaluation: designing rubrics, benchmarking coding models and building the internal platforms that score them. B.Tech CSE at Galgotias University (9.4 CGPA), graduating 2026.

Experience

Quess Corp

Feb 2026 – Present · Gurugram, India

Software Engineer

  • Designed and ran structured evaluation workflows for coding LLMs by analysing real GitHub PRs, extracting task metadata (language, category, difficulty, critical files) and validating solutions against golden reference patches.
  • Wrote 5 to 10 task-specific binary rubrics per task (40 to 50% correctness-weighted) to grade outputs across correctness, code quality, behavioural reasoning and summary accuracy.
  • Ran side-by-side (SxS) evaluations of STEM and coding responses on a weighted framework (instruction following, truthfulness, correctness, writing style, verbosity) to determine model preference.
  • Benchmarked internal model outputs against GPT-5.2 and Gemini-3 Pro, produced evidence-based justifications and delivered structured JSON reports used in post-training analysis.

WhatBytes

Aug 2025 – Jan 2026 · Bengaluru, India

Full Stack Developer

  • Built an AI / LLM Evaluation & Feedback Platform used internally to benchmark and compare outputs from multiple large language models.
  • Built the benchmarking infrastructure, supporting both static dataset runs and real-time model evaluations through provider APIs.
  • Designed multi-turn conversation evaluation workflows capturing per-turn scores and overall conversation quality.
  • Built an end-to-end project configuration system controlling task generation, evaluation rules, comparison modes and output formats; delivered clean, validated JSONL for research and analytics.
  • Implemented quality-control workflows: mandatory rationales, automated validation checks and manual QC review queues.

Slooze

Nov 2024 – Jul 2025 · Coimbatore, Tamil Nadu

Sr. Software Engineer · May 2025 – Jul 2025

  • Spearheaded an internal design-to-dev pipeline on a custom Canva workspace, streamlining design handoff and cutting UI inconsistencies by 70%.
  • Refactored and secured critical API endpoints for performance, RESTful alignment and resilience.
  • Drove zero-downtime backend deployments on AWS with monitoring, autoscaling and rollback, reaching 99.9% uptime.
  • Mentored junior developers and ran code reviews focused on scalability and maintainability; contributed to architecture decisions.

Software Engineer · Nov 2024 – Apr 2025

  • Built and shipped the official company website with 3D model integration and Framer Motion animations.
  • Moved data fetching from REST to GraphQL for a more scalable, structured architecture.
  • Connected the Request Service module with Zoho Work Channel for automated lead capture, cutting cross-team response time by 60%.
  • Refactored the codebase to remove redundant API calls, cutting initial page load time by 40%; deployed on scalable cloud infra with CI/CD.

DevTown

Sep 2023 – Oct 2024 · Mumbai, India

SDE I · Mar 2024 – Oct 2024

  • Built an AI-powered chat application from the ground up, improving frontend efficiency by 60% and backend performance by 30%.
  • Cut AI response latency from 1.86s to 1.2s (35% faster) through API design, caching and performance tuning.
  • Led an AWS cost-saving initiative: identified unused resources and set S3 expiration policies, cutting over $50,000 a year.
  • Developed and integrated APIs with secure authentication; shipped features on the MERN stack 40% faster.

Sr. Frontend Engineer · Sep 2023 – Feb 2024

  • Built modern, responsive React UI components that lifted user engagement metrics by 25%.
  • Owned frontend architecture decisions for scalable, maintainable, performance-optimised UI systems.
  • Reviewed code and enforced quality, performance and security standards.

Xipper

Jun 2023 – Aug 2023 · Bengaluru, India

Full Stack Developer

  • Designed and integrated RESTful APIs, reducing system overload and improving frontend-backend communication by 30%.
  • Built real-time communication features on WebSocket for live chat, cutting latency issues by 35%.
  • Led a performance overhaul: smoother tab switching, minimal downtime, faster navigation; reduced technical debt by 30% through reviews.

EliteKods

Dec 2022 – May 2023 · Pune, India

Full Stack Developer

  • Optimised payment gateway integration, cutting transaction failures by 25%.
  • Built and integrated mobile applications with smooth cross-device performance, reducing user complaints by 60%.
  • Designed scalable cloud architecture on Microsoft Azure for AI workloads, improving throughput by 10% while cutting infra cost via autoscaling.

Selected projects

SafeReport · Product

Next.js · TypeScript · Prisma · NeonDB (Postgres) · Gemini AI · NextAuth

AI-powered anonymous crime reporting platform. Gemini-powered incident analysis that classifies the report, extracts key facts and drafts the structured report automatically. A complete report in under a minute, tracked until it is resolved, with the reporter's identity never stored.

github.com/HardCoder404/crime-report-app

LLM Evaluation Platform · Case study · internal at WhatBytes

Next.js · TypeScript · Node.js · PostgreSQL · Redis · OpenAI / Gemini APIs

The system a team used to decide which model is actually better. Benchmark runner for static dataset passes and real-time evaluations across multiple provider APIs. Model decisions moved from opinion to evidence: every score has a rationale, every run is reproducible.

Production-grade Backend · Open source

Node.js · Express · TypeScript · MongoDB · Docker · AWS ECR / EC2

Typed Node/Express API with a real CI/CD path to AWS. TypeScript Express API with versioned routes, health and version endpoints. Push to main, live on EC2 a few minutes later. Used as the base for my own services.

github.com/HardCoder404/production-grade-backend

AWS Deployment with CI/CD Guide · Open source · most-starred

AWS EC2 · Nginx · PM2 · Docker · AWS ECR · GitHub Actions

From SSH + PM2 + Nginx to Docker + ECR + GitHub Actions. Two complete paths: a basic PM2 + Nginx setup and a Docker + ECR + GitHub Actions pipeline. A guide other developers actually use; my most-starred repository.

github.com/HardCoder404/AWS-Deployment-with-CICD-Guide

Skills

Use in production: TypeScript, JavaScript, Node.js, Next.js, React, Express.js, PostgreSQL, MongoDB, Prisma, REST APIs, AWS (EC2, S3, CloudFront, Lambda), Docker, GitHub Actions / CI/CD, Tailwind CSS, Framer Motion

Comfortable: Python, SQL, Redis, GraphQL, Microservices, Event-driven systems, Serverless, Supabase, React Native, Angular, Zoho / Canva APIs

Going deeper: Kubernetes, LLM evaluation at scale, Observability, System design

AI / LLM work: Rubric design, SxS evaluation, Benchmarking (GPT-5.2, Gemini-3 Pro), Multi-turn conversation scoring, Gemini API, OpenAI API, Prompt design

Education

B.Tech, Computer Science and Engineering · Galgotias University, Noida

Aug 2022 – Sep 2026 · CGPA 9.4 / 10

Senior Secondary (PCM) · New Lancer Convent School

Feb 2020 – Mar 2022 · 92%

Achievements & certifications

  • LeetCode 1800+ problems solved, 3-star, 200+ day streak
  • Codeforces rating 1200+
  • GSSoC 2024 open-source contributor
  • AWS Academy Graduate: Cloud Foundations and Cloud Architecting
  • 9.4 CGPA in B.Tech CSE
  • GirlScript Summer of Code 2024, Open-source contributor (May – Jun 2024)